Code came up P1251 what does this mean

no VIN told
no year told 1968 to 2023, impossible to guess year.
no country told (wow)
this engine class? real names?
D-4D, 2000 to 2023
The 1KD-FTV is a 3.0 L (2,982 cc) straight-four common rail D-4D (Direct injection four-stroke common-rail Diesel) diesel engine with a variable nozzle turbocharger (VNT


the answer is buy your service manual from toyota.
Hylux means zero lacking year and country. zero.

no car told at all,just and engine. maker Toyota,
model/year not told'
TOYOTA HIACE KDH223B 1KD-FTV????????
the service manual on the HiACE will cover all this. get?
check fuse pressure a the rail, cranking,
must be spec.PSI.

In a Toyota vehicle with a 1KD-FTV engine, the fuse and relay box is typically located in the engine compartment, on the driver's side of the vehicle. The exact location may vary depending on the specific model and year of the vehicle.
To locate the fuse and relay box, you can refer to your vehicle's owner's manual or a repair manual for specific instructions. The manual should have a diagram or illustration showing the location of the fuse and relay box, as well as a list of the fuses and relays and their respective functions.
Once you have located the fuse and relay box, you can check the fuses and relays to see if any of them are damaged or have blown. If you find a damaged fuse or relay, you will need to replace it with a new one of the same rating and function. It's important to use the correct type of fuse or relay to avoid damaging the electrical system. If you are unsure about which fuse or relay to use, you can refer to the owner's manual or consult a mechanic for assistance

Excessive resistance in the circuit
Low or no fuel
Wiring harness connector of the fuel pressure sensor
Fuel Rail Pressure Sensor
Fuel Pump

I have found those code to be shown in not only over boost conditions (wastegate) but EGR flow as well as Catalyst conditions.

Being that you are lacking power I suggest you check the EGR for being stuck open, or the catalyst for being clogged.

These engines do not like light driving, you should drive them hard from time to time to kep the catalysts clean of debris.

Code meaning Start of cold start injector short to positive.

Black smoke is a fuel problem how is it running is it missing is it hesitating does it bog down when you press the gas pedal is the check engine light or service engine soon light on need to know before can give answer

010 Toyota what>? hi-ace? ok,
mogul stuvated.
my guess is the engine Ignition coils.
no engine type stated,cars have engine opens,
we open the hood and go ahh, its and xxxx engine.
see this
http://en.wikipedia.org/wiki/Toyota_HiAce

see all them engines.
yours has one engine, pick one.
here is the list. all work different , all have unique parts and LOCATIONS. (where)

2.0 L 1TR-FE I4
2.7 L 2TR-FE I4 149hp
2.5 L 2KD-FTV I4 101hp
3.0 L 1KD-FTV I4 170hp
3.0 L 5L-E I4 91hp

Hello Dears'
I am a vehicles Mechanic, I have problem with this trouble cods P1226
the car don't give accelrator. If you kindly show me it please.
With best regard

Have you quick tested it for codes? how is the fuel pressure?, has the filter ever been changed?